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Finding the Fourth Proportional to 84,003.34, 125,961.25 and 39,618.17

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Solution

The fourth proportional to 84,003.34, 125,961.25 and 39,618.17 is: 59,406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,003.34 : 125,961.25 = 39,618.17 : x
  2. Step 2: Convert to fraction form
    84,003.34/125,961.25 = 39,618.17/x
  3. Step 3: Cross multiply
    84,003.34x = 125,961.25 × 39,618.17
  4. Step 4: Simplify right side
    84,003.34x = 4,990,354,215.91
  5. Step 5: Solve for x
    x = 4,990,354,215.91/84,003.34
  6. Step 6: Final answer
    x = 59,406.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.